Carrier frame for photographic slides



June 2, 1959 H. J. WESTPHAL CARRIER FRAME FOR PHOTOGRAPHIC SLIDESOriginal Filed March 10. 1954 2 Sheets-Sheet 1 J 8 I f m W ,7/ M 2 if\mw/%@ I1 I I v E @E MK V V r 7/ 74% ///H w/w/ //W\ 7///// Am aINVENTOR. HENRY J. WESTPHAL ,JIVII'I- a ATTORNEY United States PatentCARRIER FRAME FOR PHOTOGRAPHIC SLIDES Henry J. Westphal, Angwin, Calif.

Original application March 10, 1954, Serial No. 415,359, now Patent No.2,821,037, dated January 28, 1958. Divided and this application May 3,1957, Serial No. 659,455

11 Claims. (Cl. 40-64) This invention relates to an improved carriedframe for supporting a plurality of photographic slides, particularly ofthe color transparency variety, and to permit a rapid previewing ofthese slides for the purpose of selecting and withdrawing particularslides for exhibition. This application is a division of Serial No.415,359, filed March 10, 1954 and issued January 28, 1958, as Patent No.2,821,037.

It is customary to mount photographic film so that it may be used withprojection apparatus to form an enlarged image of the object on a screenor other viewing means. The most familiar example is the colortransparency which is usually mounted in slide form to facilitateprojection. Slide projection of black and white film is also common.Such slides may be glass slides, or more generally, a simple cardboardframe around the film.

Heretofore, storage and handling of large numbers of these slides havepresented a problem of considerable difficulty, despite the large numberand variety of devices which have been offered commercially for thepurpose. A principal defect of nearly all such devices is the necessityof removing each individual slide from the storage device before itssuitability for projection can be determined. This is primarily due tothe grouping of such slides in stacks, either horizontal or vertical, sothat each slide must be removed from the stack before it can be Viewed.Thus to choose a. number of slides on a particular subject or activity,such as boating or skiing, the exhibitor must independently remove largenumbers of slides for inspection before he can make his selection of theparticular slides to be projected. Such previewing and selectionprocedures are not only tedious and time consuming, but also are acontinuing source of annoyance to owners of even a relatively smallnumber of slides.

A further problem in previewing and selecting slides 7 2,888,762Patented June 2, 1959 in the file to a visible position in thepreviewing box, thereby permitting an entire group of slides in a singlecarrier frame to be quickly inspected at a single glance. Another objectof the present invention is to provide a slide carrier-frame for use ina combination previewing and storage device by which a large number ofbookshaped slide storage files may be successively moved through theopen end of a compartmented previewing device into a receivingcompartment, so that the slide carrier frames in any of the severalstorage files may be readily moved into a viewing position in anadjacent viewing compartment over track or groove means in both thereceiving and viewing compartments.

Still another object of the present invention is to provide a slidableframe construction for supporting a large number of film transparenciesin substantially the same plane, so that a group of slides contained'within the frame structure may be quickly and easily inspected at asingle glance.

Another object of the invention is to construct a pocketed slidecarrying frame of several layers of material, each having alignedfour-sided openings, with the middle layer having openings approximatingthe dimensions of the slides but larger than the openings in the othertwo layers, and preferably having resilient means on the top or bottomside of each of its openings so as to permit compression of theresilient means to for such an exhibition arises because the usualexhibitor wants to select carefully the slides to be shown. This isparticularly true where there are a number of similar slides on the samesubject matter or when the photographic quality of either the slide orits subject matter is important to the viewer. As a result, it isgenerally necessary to inspect each slide by holding it up to a light orputting it into a separate previewing apparatus. Such procedures onlyadd to the time consumed in viewing and selecting individual slides fora showing, thereby creating a further source of annoyance.

The present invention is directed to a solution to the above and to manyadditional problems, as will appear, and one object of the presentinvention is to provide an improved slide-carrying frame for use instorage, previewing and selection device, including an opensided storagefile and open-ended previewing box, each having aligned track or groovemeans, so that the substantially fiat slide carrying frames may bequickly moved on the track or groove means from a storage positionslightly enlarge the opening during insertion of a slide, so that slidesmay be easily inserted into or removed from the carrier frame pockets,but will be firmly retained in the frame pockets when in place. If thesecarrying frames are made of molded plastic, the several layers or partof them may be made in one piece.

Other objects and advantages of the present inven* tion will appear fromthe following description and from the drawings in which:

Fig. l is a cross-sectional view of a combination slide, storage,previewing and selection device showing one of the slide carrying framesof the present invention pulled into the viewing position in thepreviewer;

Fig. 2 is a view in longitudinal section along the line 22 of Fig. 1,showing all the carrier frames in storage position; v

Fig. 3 is a view in plan and partly broken away, showing a slide carrierframe with the top row ready to receive slides, with the second rowhaving slides in its pockets, with the third row having the front layercut away, and with the bottom row having the front and middle layersremoved to reveal the construction of the back layer;

Fig. 4 is a view in vertical section of the top row along the line'44 ofFig. 3;

Fig. 5 is a like view of the second row along the line 5--5 of Fig. 3,showing a conventional paper-mounted color slide in position in thecarrier frame, and with the slide shown in elevation;

Fig. 6 is a view in vertical section taken from a position generallyindicated by line 6-6 of Fig. 3, but

. ness between the front and back layers.

showing the manner in which the slide shown in Fig. 5.

may be lifted and removed from its position within'the carrier frame;

Fig. 7 is a view in perspective of the operation shown in Fig. 6;

Fig. 8 is a view similar to Fig. 5, with a glass-mounted slide inposition in the carrier frame;

Fig. 9 is a view similar to Fig. 5, showing the carrier frame when madeto accommodate paper-mounted slides only; and

Fig. 10 is a view like Fig. 9, showing a modification of the centerlayer when made of a thin sheet of material, embossed to make it rigidand to give the desired thick The parent application, Serial No.415,359, filed March 10, 1954, discloses and claims a combination thatincludes a previewer box or cabinet which is divided into a viewingcompartment B and a receiving compartment C. Adapted for insertion intothe receiving compartment C is a box-like storage file D which has trackmeans aligned ,with corresponding track means in the viewer compart-Iment B. As shown in Fig. l, a plurality of slide carrying iframes E isstored within the file D so that when the file is in position within thereceiving compartment C of the ,previewer A, the carrier frames E may bepulled individgually into a viewing position in the viewing compartmentB on the aligned track means. In this way an entire group of filmtransparencies may be mounted in a single ,carrier frameE for previewingor inspection, at a glance, prior to selection and removal of particularslides for exhibition. The carrier frames E are of a unique three-;layer construction for this purpose, having pockets 60 phaped to permitreadyrinsertion and removal of individglally mounted slides whileinsuring that the slides will be firmly and safely retained within theframe.

For further description of the elements A, B, C, and

,1), reference may be had to the parent application. As best seen inFigs. 1 and 2, a plurality of carrier gframes E is provided within thestorage file D so that individual frames may be independently moved onthe aligned track means from a storage position Within the file D to aviewing position in the compartment B. Each of the frames E issubstantially flat and has a pluirality of specially constructed pockets60 to receive mounted transparencies or slides 61 of the type normallyencountered in miniature camera photography. As shown, each frame E isdimensioned to fit exactly within the storage file D so that only a tabportion 62 extends beyond the side edges of the file.

The viewing position of a carrier frame B would be when it is moved (tothe right as shown in Fig. 2) over a screen 32. In this position lightfrom behind the screen 32 will be directed against the back of the filmslides 61 through the light-diffusing screen 32. As a result, it ispossible to inspect quickly a number of slides mounted in the carrier Eat a single glance.

When it is desired to inspect the slides on the next carrier frame E insequence, it is but a simple matter to push the carrier frame back intothe storage file D and to pull another carrier frame into viewingposition 'by its tab 62..

The ultimate result is that a large number of mounted slides 61 may bequickly previewed for any desired purpose. Thus, if the owner of a largenumber of slides on different subjects desired to show some'of hisslides bn a particular subject, using conventional slide projectionapparatus, the storage previewing and selecting device of the presentinvention would make it possible for him to preview his entire slidecollection in a relatively short time. During this preview he couldremove quickly ihe individual slides desired for exhibition. After theslides had been shown, he could just as quickly return the slides totheir respective positions in the files D, as will appear.

1 As has been indicated, the present invention permits a uniqueprocedure for storage of a large number of individually mountedphotographic slides or transparencies, providing ready, visual access toeach slide in a moments time in the previewer or out of it. This ispossible because a large number of such slides can be mounted on thesubstantially flat surface provided by each carrier frame E.

The present invention comprises the carrier frame E. Such a frame mustpermit rapid insertion or removal of each mounted slide 61 into or fromany desired pocket 60 in the carrier frame. In addition, each slideshould be firmly and safely held in the pocket after insertion so thatit will be adequately protected from damage during either storage orpreviewing.

A preferred construction for a carrier frame suitable for the abovepurpose is illustrated in Figs. 3-6, 8 and 9. As shown, the carrierframe E is constructed of three layers 70, 71, 72 rigidly securedtogether to form the slide receiving pockets 60. The central framemember or backing 71 forms the body of the carrier frame E and isprovided with a series of elongated openings 74. Each of these openings74 has upper, lower and vertical sides 75, 76, 77, 78, respectively,with their vertical dimensions slightly larger than the verticaldimensions (height) of a standard photographic slide 61. The horizontaldistance between the sides 77 and 78 is in multiples of the size of themounted slides plus the slight clearance needed between slides. Spacedat intervals along the upper side 75 of each opening are pluralities ofresilient means 79 which, preferably, are blocks of sponge rubber or anyother suitable resilient material. The lower side 76 of each opening hasa series of recesses 80, with one under each space that is to receive aslide. Each recess 80 may be spaced directly opposite its resilientmeans 79 to facilitate the insertion or removal of the slide into orfrom that-space, asswill be later explained. Instead of being made froma sheet of material of the thickness desired for the space between thefrontface 70 and the rear face 72, the center layer 71a may be made asshown in Fig. 10 where the sheet is thin and is embossed to give thethickness between the layers 70 and 72. For this purpose a thin sheet ofaluminum or of board which dries hard and stiff when molded may be used.

The-front face '70 forms a retaining member and, like the center layer71, has a series ofelongated openings 81. These openings, formed byupper, lower and vertical sides 82, 83, 84 and 85, respectively,correspond in shape and are positioned adjacent the openings 74-. Thevertical dimension of each opening 81 is smaller than its relatedopening 74, so that it overhangs the top and the bottom edges of theopening 74. The vertical dimension between .82 and 83 is less than thatof a mounted slide 61, but large enough so that when the slide 61 islifted toward the upper edge 75, the bottom edge of the slide will clearthe edge 83 and drop down behind it. The lower edge 83 has recesses 86in vertical alignment with the recesses 80 in the center layer 71. (SeeFigs. 6 and 7).

The back face 72 forms a retaining member and is provided' with a seriesof individual square openings 87 formed by verticalribs 88. Eachindividual opening has upper, lower and vertical sides 89, 90, 91 and92, respectively, with the dimension smaller than the overall size ofthe mounted slide 61 and at least as large as the area filled by thetransparency. The vertical ribs 88 act as guides for the'positioning ofslides within the pockets 60.v

Preferably each carrier frame E is formed by bonding the separate framemembers 70, 71 and 72 together like a sandwich to form an integral unit.In the embodi- Inent shown, a molded plastic frame member is used forthe center layer 71, with plastic front and back layers 70,72, bonded onit. The carrier frame B may also be constructed of many other suitablematerials, such as light sheets of aluminum (Fig. 10) or solid fibercraft board for the center layer, with outer frames of heavy paperpressboard, or plastic secured thereto, as by an adhesive or glue.

With particular reference to Figs. 4-9 it will be seen that thehorizontally elongated pockets 6% are formed by the overlapping edges ofthe front and rear frame members 70, 72, with respect to the opening inthe center frame member 71. This is the case also in the carrier frameof Fig. 9 where the center layer 71 is only thick enough to accommodatea paper-mounted slide 61. In Figs. '4, 5, 6, and 8 the center layer 71is thicker and the bottom" edge 76, 93, is adapted to hold paper orglass-mounted slides. In Fig. 4 the pocket 69, provided between thefront and rear frames 7t 72 is clearly illustrated. Preferably, thevertical distance between the resilient pad 79 and the bottom edges 76,93, of the pocket 60 is about equal to the standard height dimension ofa conventional photographic slide, so that each slide will not be undercompression, but will be locked while in the pocket.

Since the device of Figs. 4, 5, 6, and 8 is adapted to receive slides ofdifferent thicknesses, I prefer to provide a step in the lower edge ofeach center layer 71, so that there is a surface 76 on which a thickglass-mounted slide will rest (Fig. 8) and a surface 93 on which athinner paper-mounted slide will rest (Fig. 5). As a result of thisstepped structure, both types of slides may be snugly yet safelypositioned within the pockets 60, since in neither case is there anyvertical compression of the slide in the pockets by the pads 79. As aresult, slides positioned within the pockets 60 will receive a maximumdegree of protection during long periods of storage or use. For thosewho have only paper-mounted slides it is preferable to have the centerlayer 71 thinner, so that the overall thickness of the carrier frame Eis kept at a minimum and the slide rests on the lower edge 171. (SeeFig. 9.)

To lock each slide in its pocket, a resilient pad 79 is provided, as isbest illustrated in Figs. 5, 8, and 9. To insert or remove a slide, itis lifted until the bottom edge of the slide will pass freely over thelower edge 83 of the opening 81. This causes the upper edge of the slideto bury itself in the pad 79. (Fig. 6). To remove a slide, it is onlynecessary to insert a finger nail or other sharp, pointed means into theopening provided by the aligned recesses 80, 86, lift the slideupwardly, and pull the lower edge of the slide outwardly over the loweredge 83 of the pocket 60.

To facilitate insertion or removal of the slides, a handy scoop 100 maybe provided. The scoop has a fiat blade portion 101 with a pointed end102 and raised slide supports 103 extending vertically upward from thebase of the blade. The operation of the scoop 100 will be clear fromFig. 7, where the pointed end 102 has been inserted beneath the loweredge of the slide and the scoop pivoted about the handle 104 to raisethe lower edge of the slide 61 up and over the edge 83 of the opening74. Continued movement of the scoop about the handle 104 will cause theslide to settle against the supports 103, and the thumb may be pressedagainst the slide between the supports 103. The slide may then betransported to any desired position by the blade portion 101 of thescoop 100. To insert a slide with the scoop 100, the process shown inFig. 14 is reversed with the handle 104 being pivoted upward about thepointed end 102 to permit the slide 61 to drop into the pocket 60. Ifdesired, a suitably constructed door 105 may be provided in the wall 21,so that the chamber 106 may be used for storing both the scoop 100 andthe wall plug 40.

It will be apparent that a plurality of slides 61 may be supported inthe pockets 60 of each carrier frame, with all the slides in a singleframe E being mounted in substantially the same plane. The slides, oncepositioned in their pockets 60 with a resilient pad 79 above each one,are not likely to jostle out of the pockets no matter how rough thehandling to which the carrier frame is subjected. In some cases it mayalso be desirable to provide a continuous resilient strip instead of theseparate pads 79 for this purpose, and material other than rubber may beused.

With the carrier frames E, just described, it ispossible to store largenumbers of individually mounted photographic slides or transparencies ina way that permits rapid inspection of the slides without removing themfrom their storage pockets. Further, the slides are firmly and safelymounted when in the pockets 60 so that the possibility of damage to theslides through excessive handling is greatly diminished. When combinedwith the tracked storage files D, the carrier frames provide manyadditional advantages useful when storing large numbers of photographicslides. For example, a number of slides may be grouped in a particularcarrier frameaccording to the subject matter depicted, the quality ofthe slides, chronological sequence, or in any other convenient manner.The storage files permit a number of such carrier frames to beconveniently stored together for general reference. Likewise, provisionmay be made for a general indexing of the frames E on the outside of thestorage file D, on the frames themselves, or on both. In particular, thefiles D may be stored as books, with the sub.- ject matter indicatedeither generally or specifically on title portions.

Once such a filing system has been established, it is a simple matter toinsert a desired storage file D' into the receiving compartment C of thepreviewer A, so that the subject matter of any carrier frame E withinthe file may be quickly and easily inspected at a glance by pulling theframe E into the viewing compartment B. In addition, the close groupingof a large number of slides in a view-' ing position on a single carrierframe permits the viewer to compare the individual slides in a mannernot previously possible. This is particularly useful when inspectingsimilar slides or slides in pictorial sequence.

To those skilled in the art to which this invention relates, manyadditional changes in construction and widely differing embodiments andapplications of the invention will suggest themselves without departingfrom the spirit and scope of the invention. It should be clear that thedisclosures and the description herein must be looked upon as purelyillustrative and as not intended to be in any sense limiting.

I claim:

1. A carrier frame suitable for mounting a large number ofindividually-mounted color transparency'slides in horizontal andvertical rows, comprising a flat stiff rear portion having horizontallyand vertically aligned rows of four-sided windows therethrough within afour-sided margin, said windows being smaller than the individual slidemounts but not smaller than the transparencies themselves; a flat stiffcentral portion secured to said rear portion and comprising a four-sidedmargin with a plurality of horizontal strips extending from margin tomargin to define extended rectangular openings longer than severalwindows and spaced vertically from each other a distance at least asgreat as the height of the individual slide mounts; and a stiff flatforward portion secured to said central portion and having a four sidedmargin and horizontal strips wider vertically than those of the centralportion, so that the vertical distance between strips is less than theheight of the individual slide mounts, each slide mount being insertedby urging it between said forward and rear portions toward a horizontalstrip of said central portion until it clears the opposite horizontalstrip of said forward portion.

2. The frame of claim 1 in which spongy resilient means is provided onone side of each horizontal member of said central portion adjacent eachwindow, so that each slide may compress said resilient means duringinsertion of said slide and so that the distance between said resilientmeans and the opposite horizontal portion of said central portion isless than the corresponding dimension of slide until said resilientmeans is compressed, so that each slide is held snugly thereby.

3. The device of claim 2 in which each of the horizontally extendingmembers of said front portion are provided with a plurality of recesses,one opposite each said resilient means, to facilitate removal of theslides.

4. A carrier frame suitable for mounting a large number ofindividually-mounted color transparency slides in horizontal andvertical rows, comprising a flat stiff rear portion having horizontallyand vertically aligned rows of four-sided windows therethrough within afour-sided margin, said windows being smaller than the individual slidemounts but not smaller than the transparencies themselves; a flat stiffcentral portion secured to said rear portion andcomprising a four-sidedmargin with a plurality of horie zontal strips extending from margin tomargin to define extended rectangular openings longer than severalwindows and spaced vertically from each other a distance at least asgreat as the diameter of the individual slide mounts; spongy resilientmeans on one side of each horizontal strip of'said central portionadjacent each window, so that each slide may compress said resilientmeans during insertion of said slide and so that the distance betweensaid resilient means and the opposite horizontal strip of said centralportion is less than the corresponding dimension of slide until saidresilient means is compressed, so that each slide isheld snugly thereby,the edges of said horizontally extending strips of said central portionopposite said resilient means being stepped, whereby slide mounts ofdifierent thickness may be held snugly; and a stiff flat forward portionsecured to said central portion and having a four sidedmargin andhorizontal strips wider verticallythanthose .of the central portion, sothat the vertical distance between strips is less than the diameter ofthe individual slide mounts, each slide mount being inserted by'urgingit between said forward and rear portions toward a horizontal strip ofsaid central portion until it clears the opposite horizontal strip ofsaid forward portion, each of the horizontally extending members of saidfront portion being provided with a plurality of recesses, one oppositeeach said resilient means, to facilitate removal of the slides.

5. The device of claim 4 in which each said portion is a separate stifIsheet secured to the adjacent sheet.

6. The device of claim 5 in which all said portions are integral.

7. A carrier frame suitable for mounting a large number ofindividually-mounted color transparency slides in horizontal andvertical rows, comprising a stiff rear sheet having horizontally andvertically aligned rows of four-sided windows therethrough, surroundedby a foursided margin, said windows being smaller than the individualslide mounts but not smaller than the transparencies themselves; a stiffcentral sheet secured to said rear sheet and having a four-sided marginnarrower than the margin of said rear sheet and horizontal stripsextending from margin to margin to define long, horizontal, rectangularopenings and spaced vertically from each other a distance at least asgreat as the height of the individual slide mounts; and a stiif forwardsheet secured to said central sheet and having a four-sided margin andhorizontal strips wider vertically than those of the central sheet, sothat the vertical distance between strips is less than the height of theindividual slide mounts, each said strip of said forward sheet havingcut out portions on one edge centrally located with respect to said rearwindows, for retracting slides from between said front and rear sheets.

8. A carrier frame suitable for mounting a large number ofindividually-mounted color transparency slides in horizontal andvertical rows, comprising a stiff rear sheet having horizontally andvertically aligned rows of four-sided windows therethrou. bounded by afoursided margin, said windows being smaller than the individual slidemounts but not smaller than the transparencies themselves; a stiifcentral sheet permanently secured to said rear sheet and having itsperimeter equal to that of said rear sheet and its four-sided marginnarrower than the margin of said rear sheet, said central sheet havingparallel horizontal strips extending from margin to margin to definelong, horizontal, rectangular openings and spaced vertically from eachother a distance at least as great as the height of the individual slidemounts, the horizontal edges being stepped on one side to accommodatedifferent widths of slide mounts; a plurality of resilient compressibleslide retaining means secured to the edge of the horizontal members ofsaid central sheet adjacent each window and opposite said stepped edge;and a stiff forward sheet permanently secured to said central .sheetiandhaving its perimeterlequal to that of said rear and central sheets, afour-sided margin and horizontal strips wider vertically than those ofthe central sheet, so that the verticaldistance between strips is lessthan the height of the individual slide mounts, each said strip ofsaidforward sheet having cut out portions on the edge adjacent thestepped edge of the central sheet, centrally located with respect tosaid rear windows, for retracting slides from-between said front andrear sheets.

9. A carrier frame suitable for mounting a large number ofindividually-mounted color transparency slides in horizontal andvertical rows, comprising a flat stilf rear portion having horizontallyand vertically aligned rows of four-sided windows therethrough within afour-sided margin, said windows being smaller than the individual slidemounts but not smaller than the transparencies themselves; a flat stilfcentral portion secured to said rear portion and comprising a four-sidedmargin with a plurality of horizontal strips extending from margin tomargin to define extended rectangular openings longer than severalwindows and spaced vertically from each other a distance at least asgreat as the diameter of the individual slide mounts, held snuglythereby, one edge of each said horizontally extending strip of saidcentral portion being stepped, whereby slide mounts of differentthickness may be held snugly; and a stiff flat forward portion securedto said central portion and having a four sided margin and horizontalstrips wider vertically than those of the central portion, so that thevertical distance between strips is less than the diameter of theindividual slide mounts, each slide mount being inserted by urging itbetween said forward and rear portions toward a horizontal strip of saidcentral portion untilit clears the opposite horizontal strip of saidforward portion.

10. A carrier frame suitable for mounting a large number of individuallymounted photographic slides comprising a relatively stiff, substantiallyflat central layer provided with a plurality of four-sided openingshaving dimensions greater than any of the dimensions of said slides; arear slide-retaining member rigidly secured to one face of said centrallayer and provided with a plurality of four-sided openings having atleast two sides of substantially smaller dimensions than correspondingdimensions of said slides; a front slide-retaining member rigidlysecured to the other face of said central layer and likewise providedwith a plurality of four-sided openings having at least two sides ofsubstantially smaller dimensions than the corresponding dimensions ofsaid slides, whereby portions of said front and rear slideretainingmembers overlap said central layer on either side thereof to form aplurality of pockets into which slides may be readily inserted and whichfirmly position the slides for safe keeping while permitting visibleinspection of any of the slides held in the frame; resilient means in atleast one side of each pocket for compression by an edge of a slideduring insertion of the slide into the pocket, so that the dimensionfrom said resilient means to an opposite side of the pocket does notexceed the corresponding dimension of the slide, each pocketformingopening in said central layer and in said front slide-retaining memberbeing provided with a recess on a side opposite said resilient means tofacilitate removal of the slides from said pockets, the sides of thepockets opposite said resilient means having a recessed portionproviding a step effect, whereby slides of different dimensions may beinserted in said pocket.

ll. A carrier frame suitable for mounting a large number of individuallymounted photographic slides comprising a relatively stiff, substantiallyflat central layer provided with a plurality of four-sided openingshaving dimensions greater than any of the dimensions of said slides; arear slide-retaining member rigidly secured to one face of said centrallayer and provided with a plurality of four-sided openings having atleast two sides of substant ally smaller dimensions than correspondingdimensions of said slides; and a front slide-retaining member rigidlysecured to the other face of said central layer and likewise providedwith a plurality of four-sided openings having at least two sides ofsubstantially smaller dimensions than the corresponding dimensions ofsaid slides, whereby portions of said front and rear slide-retainingmembers overlap said central layer on either side thereof to form aplurality of pockets into which slides may be readily inserted and whichfirmly position the slides for safe keeping while permitting visibleinspection of any of the slides held in the frame, one side of eachpocket having a recessed portion providing a step efiect, whereby slidesof different dimensions may be inserted in said pocket.

References Cited in the file of this patent UNITED STATES PATENTSWilkenson June 25, Di Bona July 10, Meyer July 12, Rinn Aug. 23, DeSherbinin Feb. 23, De Sherbinin Nov. 16, Schuler Sept. 2, McArthur July16,

FOREIGN PATENTS Italy Sept. 3,

